Welding multi-tool



FIG. 1 is a front perspective view of a welding multi-tool showing my new design with environment shown in broken lines;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a front view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a rear perspective view thereof.

The broken lines in the drawings illustrate portions of the welding multi-tool which form no part of the claimed design. 

CLAIM The ornamental design for a welding multi-tool, as shown and described. 